Note from ELPALLSKY...Still looking at the possibility of lightning!
Readers, if you witnessed a flash or flashes in Illinois, Indiana or Ohio 1Feb2011, please click on comments below or login to my chat window and type in your observation. Thank You!

UPDATE...

Lightning in Chicago, induced by a powerful winter storm, is included in national news story. It appears that the same storm front could also be responsible for flashes seen in Indiana and Ohio as it pushed east the evening of 1FEB2011. See the news story below...